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Measurement and Instrumentation

Measurement and Instrumentation
A spring controlled indicating instrument has a deflection of 90deg for maximum current I. The corresponding deflection for a gravity controlled instrument is

0°
120°
90°
30°

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Measurement and Instrumentation
The controlling torque of an indicating instrument ______ as the deflection of the moving system increases.

Remains same
Increases
Decreases
None of the listed here

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Measurement and Instrumentation
The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and stray fields are

 inclined at 60o.
 perpendicular.
 inclined at 30o.
 parallel.

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Measurement and Instrumentation
A PMMC instrument can be used as flux meter

By eliminating the control springs
By making control springs of large moment of inertia
By using a low resistance shunt
By using a high series resistance

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Measurement and Instrumentation
The difference between the indicated value and the true value of a quantity is

 Absolute error
 Gross error
 Relative error
 Dynamic error

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Measurement and Instrumentation
An average reading digital multimeter reads 10 V when fed a triangular wave, symmetric about the axis. For the same input, an rms reading meter will read

  10√3.
 10.
 20√3.
 20.

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MORE MCQ ON Measurement and Instrumentation

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